US1454084A - Valve-actuating device for hydrocarbon motors - Google Patents

Description

May 8, 1923; I

- C. R. SHORT AL E ACT-UATING DEVICE FOR HYDROCARBON MOTORS Filed April 21 19 17 INVENTOR;

5 Michigan, have invented certain new and vide a motor,

- I means and the valve'imschanism.

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ensshns n sneer, or DETROIT jM-ICHIGAN,

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w Applicetion sled s ni 21, 191 7.. mm.- worse.

To all whom it may concern: i I

Be it known that 1, CHARLES; R; Snonnu subject of the King of GreetBrita-imnnd" resident of Detroit, Wayne County, State of useful Improvements in Valve-Actuating Devices for Hydrocarbon the following is n specification. Th's invention relatesto' hydrocarbon tors, and more particularly to the valve mechanism thereof.

provide a valve mechanism and itsoperating means with connections adapted to 'auto- 'matically-com ensate for 'sndteke up any variations in the length of its various .parts.

Another object of this invention is to pro .hevin a, nism with a device etween the valvememer and its operating means for. reventing snyixnproper clearances between t ese parts.

'Anothe'r'object of this invention is to provide e. valve mechanism withs cushion device hetwee'n'the valve proper and its actuetin means. A

with the constructions of poppet valve mechanisms previously used in internal cornbustion engines, it-hss been found necessary to maintain certain clearances between the valve proper and its actuating means. With such constructions, an undesirable click or tan is reduced, when this clearance is rapidly talien up. To overcome this and other difiicnlties, I have provided means'for maintaining each of the connecting'pa'rts in contect wlth the others,nnd also for cushioning the impact blow between the actuating These and various other objects will more clearly appear from the following description, taken in connection with the accompanying drawings, which form a part of this specification, and in which: 1

Figure 1 is an end elevation, broken awa'y, glue, illustrating a preferred form of my invention; end

with portions Figure 2 is an assembly view, with pot-1, tions in vertical section, of

the tnppet and connection, illustrated in Figure 1. q

Referring to the drawings, 10 represents the motor crank case in which is mounted a, shuit 11, provided with cams 1'2. A cylin- Motors, of which.

One of the objects of this invention 'i s to- P p l mecha-.

' tween the upper portion of theplug and of an internal combustion ender..bl0ck 13,he ving a spring closed poppet valve mechanism 14;,me'y be mounted on the crank-mes. A rocker-erm'15 is adapted to I have its centralportion 16 sleeved on a shaft lTwhichvis supported in an arm 18, this arin hei'ng detachebly mounted on the cylindeihead was by bolts 20. One end of the rocker arm 15 is provided with'a spherical fmce 21, which. is adapted to'abut against the upper end' 22 o the poppet valve memher 14. Slidehly mounted 1n a guide sleeve 23, which is secured by bolts 24 to thecrank case 10, is a tubular tappet member 2 5, which is provided-at its lower end witlfu" contact shoe 26, adapted to be actuated by the cam 12. A' hollow plug 27 is adapted to be secured in'any we'll knowh manner, such 7 as b welding to the upper end .of this rnemr.

The plug is formed \vithuhollow cylindricol interior ZS, having a taperedend 29 and a piston member 31 having a tapered. end portion 32 is adapted to be slidably mounted in the-plug with a spring-33 out-turned flange 34 on the piston member.

A valve rod 35' is adapted tohave its upper end 36 preferably adjustably' connected with a button 37, secured to" the short end 38'of the rocker arm 15, and to have its lower end 39 resting in the interior of the piston member 31. P

' The lower end32 of the piston member is' provided with e port- 41 connecting its-interior and exterior portions adjacent its'bottom. It is to be noted that thep'arts just described are so correlated functiona dash pot and cushion connection between the upper end of the valve tappet undthe valve pro er. '2, ith the parts in the position illustratedin the drawings, that is with the tsppet rest ing on the inactive portion of the pain 12, the relatively light spring 33 will-maintain the teppet 25, operating rod 35, rocker cm 15 end the rocker arm 22 of. thepoypet val-ve' member 15 in contact with shutting ports, thus preventing any clesrsncc between these various members. 4 There will he sucient the pi member I the 31 and the exterior of the lower end 89 of in v i -30 member 31 will cushion all which flovvs from the rocker arm upper end of the rod to be cor iecl to the bottom 40 of the member 31, Where it will be drained through the port 41. between the lower end 32 of the piston member and. the end-29 of the cylindrical member 27. .t is

to be noted. that the upper of the piston member 34 is counter-sunk etit for retain p ing a? small pool of oil around the adjacent portion of the rod 35.

' As the cam shaft 11 rotatespbringing the active portion of the cam 12 against the con- 15 and the tact shoe of the tappet member and beginsto raise the some, the initial movement 15 will cause a compression of the relatively light spring 33 and the lower end of the pie-- ton member 31 on the oil therebeneath, will thus cushion the relative movement between the various connecting ports, and any noise 219 is thereby obviated. "Of course, after the valve, mechanism hos'been opened and the receding portion of the com i2 is brought against the t appet member 25. the spring and dash not will function to release 5 pressure of the piston member on the oil cushion therebelow end permit more oil to flow into the clash pot if necessary.

Itmust also be. noted that the oil filling the spaces about tberoii. 35 ozui the piston sitle faces with a filmof .oil and silence any side movement {on the part of the several elements in relation' one to the other. it will be thus seen from b scription, that l have provided,

simple and efiective manner, efficient clearance compensator and yielding connecthe foregoing (letionsfor a valve m chenism, particularly of the poppet valve type, though it will. be onw derstood that my invention will not be necessarily limited to such on application.

While I have ciescribeal and will specifically claim What l deem to be a preferred embodiment of my invention, it will be ohso vious to those skilled in the art. that varions modifications and changes mov be made Without departing from the spirit end scope hereof. i

Having thus described my invention, whet .coi iprising a.

in it very" I claim and desire to secure by Letters Pat ent-is: I

1. in an internal combustion engine the combination Wltllfit valve mechanism, a topp cylinder e hollow piston therein having a portconnecting its interior end exterior, and e'roil having one. emi mounted in said piston.

52. in on internal combustion engine, the combination with e valve mechanism, a tap pet having on inner bore, a piston fitting said bore and having; at centre orifice in communication with said bore. a. rod stepped in the cent 'ai orifice oi: said piston, anii means for yielclingly supporting said rocl.

' 3. In on internal combustion engine, the combination with a. valve mechanism, atop-l pet having an inner bore, :1 piston fitting said bore and having; '1 central orifice in communication with said bore a rod stepped in the central orifice of seicl piston, and. "means for vielclingly supporting said. piston.

4%. In valve mechanism of the class (le scribed e reciprocating tappet liming e. liq-- nid receiving chamber at its upper and; a piston operating Within said chamber and o rocbenit connection therebetween having a liquid receiving chamber of less area than the chamber in. sehi toppet; a valve operating me the lower encl of which extends into the chamber in saicl piston; a spring: intermediate snicl toppet and piston; and a liquid passage extending; be-

tween said two liquid receiving chzuiibers.

5. in valve mechanism of the class clescribeil, it reciprocating teppet having it liquid. receiving chamber at its upper end;

piston operating within said chamber and having a. liquid receiving chamber of less ores mm the chamber in seici toppet; a valve operating: red the lower end of which extends into the chamber in soicl piston; means for moving: said piston out of the chamber in sold toppet; and liquiol passage in said piston and through which said. tivo iqnicl receiving chambers are placed in communication with one another,

in testimony whereof I sill my nature.

- I AELES it, SHORE:

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